[PATCHv4 47/48] thermal: core: use kzalloc(sizeof(*ptr),...)

From: Eduardo Valentin
Date: Tue May 31 2016 - 02:22:00 EST


As a safety check, this patch changes thermal
core to check for pointer content size, instead of type size,
while allocating memory.

Cc: Zhang Rui <rui.zhang@xxxxxxxxx>
Cc: linux-pm@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Eduardo Valentin <edubezval@xxxxxxxxx>
---
drivers/thermal/thermal_core.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index b3fa47e..792aab7 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -667,8 +667,7 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
if (lower > upper || upper > max_state)
return -EINVAL;

- dev =
- kzalloc(sizeof(struct thermal_instance), GFP_KERNEL);
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
dev->tz = tz;
@@ -910,7 +909,7 @@ __thermal_cooling_device_register(struct device_node *np,
!ops->set_cur_state)
return ERR_PTR(-EINVAL);

- cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
+ cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
if (!cdev)
return ERR_PTR(-ENOMEM);

@@ -1155,7 +1154,7 @@ thermal_zone_device_register(const char *type, int trips, int mask,
if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp))
return ERR_PTR(-EINVAL);

- tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
+ tz = kzalloc(sizeof(*tz), GFP_KERNEL);
if (!tz)
return ERR_PTR(-ENOMEM);

--
2.1.4